2 sentences for 前线 (qián​xiàn — workface)

1. 经理亲自去慰劳前线的员工。

   jīng​lǐ qīn​zì qù wèi láo qián​xiàn de yuán​gōng.

   The manager went in person to express appreciation to the frontline employees.

   Source: Dong Chinese Dictionary

2. 工程师正在生产前线解决技术难题。

   gōng​chéng​shī zhèng​zài shēng​chǎn qián​xiàn jiě​jué jì​shù nán​tí.

   Engineers are solving technical problems on the production front line.

   Source: Dong Chinese Dictionary